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US 85 (now NM 478) in
Las Cruces. This is currently the oldest motel in Las Cruces still standing. The first designated highway between
Anthony at the
Texas state line and
Las Cruces was New Mexico State Road 1 in 1912. NM 1 continued past Las Cruces through
Albuquerque and
Santa Fe to the
Colorado state line near
Raton. The road to
Lordsburg was designated NM 4 while the road to
Alamogordo was designated NM 3. Between Las Cruces and Anthony, NM 1 passed through
Berino and
Mesquite. The
Dixie Overland Highway auto trail was designated over NM 1 in 1917. The Dixie Overland Highway was the first marked route to run between
Savannah, Georgia and southern California. The auto trail entered New Mexico through Anthony from
El Paso, Texas, then traveled north to
Mesilla Park where it turned west to
Deming,
Lorsburg and
Steins, before heading south into
Rodeo and southwest into Arizona towards
Douglas. By 1920, the
Bankhead Highway was also designated over the southern part of NM 1, further joined by the
Old Spanish Trail in 1923. In 1917,
Texas State Highway 1 was designated from the south end of NM 1 to El Paso along the Dixie Overland Highway. On November 11, 1926, the
United States Department of Agriculture and the
American Association of State Highway Officials approved and designated a new numbered transcontinental highway system known as the
United States Numbered Highway System. NM 1 was designated as part of
U.S. Route 80 between Anthony and Las Cruces, while the section north of Las Cruces became
U.S. Route 85. US 80 was also designated over the entirety of NM 4 between Las Cruces and Lordsburg. Much like the Dixie Overland Highway before it, US 80 also ran between San Diego and Savannah. The only major change to the route for many years was a slight realignment of US 80 through downtown Las Cruces in the 1930s. By 1939,
US 70 had replaced NM 3 between Alamogordo and Las Cruces and multiplexed with US 80 from Las Cruces to Lordsburg. In 1946, US 85 was extended south to the Mexican border in El Paso, multiplexing with US 80 from Las Cruces into Texas. In 1956, US 80 and US 85 were moved onto a new alignment between Anthony and Las Cruces bypassing the older route through Berino, Vado, Mesquite,
Fillmore and
Mesilla Park. The old route was re-designated NM 478. The new bypass was later rebuilt to Interstate highway standards and became part of
Interstate 10. I-10 replaced all of US 80 through western Texas, New Mexico and part of Arizona. As such, US 80 was truncated to the southern terminus of NM 478 in 1989. In 1991, US 80 was removed from New Mexico completely and the small remaining section became part of
NM 460. Much like it did when first designated, NM 478 still ends in the south at NM 460 (former US 80) and US 70 within Las Cruces at the north. ==Route description==